The Sinead O'Connor-Miley Cyrus feud won't end and appears to be escalating.

O'Connor says the recent re-publication of her 2012 public plea for psychiatric help by the 20-year-old pop star on Twitter has spurred people to tell her to commit suicide.

O'Connor, 46, made her comments in a fourth open letter to Cyrus posted on her website late on Monday, hours after the release of the younger star's new album, "Bangerz." Cyrus has not responded to her latest remarks.

"As a result of what you did I have had numerous communications from people urging me to commit suicide," O'Connor said. "Not to mention I have been the subject of literally thousands of abusive articles and or comments left after articles, which state that I and therefore all perceived mentally ill people, should be bullied and be invalidated."

"Luckily I am a strong person. And I have four children whose lives would be destroyed if I were to buckle under the abuse you set me up for.. If I were not, and or I did not have four children, these types of communications and these types of articles and remarks could have had their desired effect," she said. "I might add my children have been extremely upset by the nature of media attitudes toward their mother on the grounds their mother is (falsely) believed to be mentally ill."

The feud appeared to have begun last week after O'Connor said in a first open letter, posted on her website, that Cyrus should not "prostitute" herself for the sake of the music industry. She also complimented her about her talent. During a recent interview on the "Today" show Cyrus had dubbed the Irish singer's earliest comments about her as "crazy."

Cyrus had responded to the first letter by posting a screenshot of O'Connor's 2012 tweets, in which she called for psychiatric help, and also cited Amanda Bynes, a fellow former child star who is currently being treated in a private facility after being hospitalized on a 5150 psychiatric hold.

"My problem with you stems from your response to my first letter," O'Connor wrote. "Until you exposed me ( And Amanda Bynes) to abuse on the grounds of my having sought help (extremely coherently) to save my life, when experiencing suicidal compulsion as a side effect of a medication called Tegretol, I had no problem with you whatsoever."

O'Connor said that what Cyrus did to her and Bynes "encouraged enormous abuse of us both, publicly and privately."

"Young people are being buried in their droves, having died by suicides brought about by bulling of the type you perhaps unwittingly subjected myself and Amanda to," she added. "The type of media bullying which resulted from what you did causes suicides."

(Pictured above: Sinead O'Connor performs at the Auditorium Parco in Rome, Italy on April 7, 2013. / Miley Cyrus talks to OTRC.com at the Maxim Hot 100 women event on May 16, 2013. She was deemed the magazine's "Hottest Woman." (Watch VIDEO).